MINOR: pool: move pool declarations to read_mostly
All pool heads are accessed via a pointer and should not be shared with
highly written variables. Move them to the read_mostly section.
diff --git a/src/dynbuf.c b/src/dynbuf.c
index 8b492e2..fcbb8fa 100644
--- a/src/dynbuf.c
+++ b/src/dynbuf.c
@@ -20,7 +20,7 @@
#include <haproxy/list.h>
#include <haproxy/pool.h>
-struct pool_head *pool_head_buffer;
+struct pool_head *pool_head_buffer __read_mostly;
/* perform minimal intializations, report 0 in case of error, 1 if OK. */
int init_buffer()